Auger



(No Model.)

W. BREDE 85 L. A. DE LA NUX.

AUGER.

.L MM

9 a Wm w, m M

1, mam/m M P m W M UNITED STATES PATENT OFFICE.

WVILLIAM BREDE AND LEON ALBERT DE LA NUX, OF PAAUHAU MILL, HAMAKUA,I'IATVAII.

AUGER.

SPECIFICATION forming part of Letters Patent No. 450,908, dated April21, 1891.

Application filed August 16, 1890. Serial No. 362,172. (No modeh) To allwhom, it may concern.-

Be it known that we, WILLIAM BREDE and LEON ALBERT DE LA NUX, of PaauhauMill, I-Iamakua, Hawaii, have invented a new and useful Improvement inAngers, of which the following is a full, clear, and exact description.

Our invention relates to animprovementin angers, and has for its objectto provide a means whereby cutters may be detachablyattached to the webof the shank in such manner as to be expeditiously and convenientlyapplied and removed, the cutters being adapted to define the contour ofthe hole to be cut, and prevent the web upon entering the wood fromtearing the upper surface thereof.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar figures of reference indicatecorresponding parts in all the views.

Figure 1 is a side elevation of an anger having the improvement applied.Fig. 2 is a diametrical section through the shank. Fig. 3 is an enlargedpartial side elevation of the shank with one cutter removed, and Fig. 4is a perspective view of the cutter detached.

The twisted shank 10 of the anger is of the usual construction; but inthe exterior of the web 11, preferably at opposite sides, dovetailtapering slots 12 are formed, and the metal of the web at each side ofeach slot is carried downward to form spurs 13, whereby the length ofthe slots is rendered greater than the regular thickness of the web, asis best illustrated in Fig. 3.

A cutter 14 is adapted to snugly fit into each slot 12, the side edgesof which are provided with a bevel 15, the lower cutting-edge 16 beingpreferably semicircular and beveled downward upon the inner face. Thecutters are essentially wedge-shaped or tapering, and are narrower atthe top than at the bottom, and in each cutter an aperture 17 is formednear its upper edge, which apertures, when the cutters are in positionupon the auger, register with a diametrical bore in the web. The cuttersare held to place by a pin 18, of sufficient length to pass through thebore of the web out flush with the outer face of the cutters, orpractically so.

It will be readily observed that the cutters may be expeditiously andconveniently detached and others substituted when occasion may demand,the attachment being eifected by driving the pin outward, first in onedirection and then in the other when both of the cutters are to be takenout of their sockets. \Vhen the pin has been removed, the cutters may beloosened by tapping them slightly upon the top.

It will be further observed that we do not employ threads upon the pinor upon the cutters, all the other surfaces being plain; therefore theparts are not rendered liable to rust or become cemented together.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent- 1. In an anger, the combination, with the webof the shank, the said web being provided with dovetail recesses in itsedges, of cutters adapted to enter said recesses, and a pin passedthrough the cutters and the web, as and for the purpose specified.

2. In an anger, the combination, with the web of its shank, the said webbeing provided with dovetail tapering recesses in its edges anddownwardly-proj ecting spurs at each side of the recesses, of cuttersprovided with beveled edges and an essentially tapering body adapted tofit into the said recesses of the web, and a pin passed through thecutters and the web, as and for the purpose specified.

WJLLIAM BREDE. LEON ALBERT DE LA NUX.

Witnesses to signature of William Brede:

R. A. LYMAN, RICHARD J. LYMAN. lVitnesses for Lon Albert de la Nux:

CHAS. T. GULIc-K, H. W. GREEN.

